Doña Carmen knows the exact weight of a five-hundred-peso bill. She has known it for thirty years, ever since she set up her corner fruit stall under the corrugated iron roof of a bustling market in Mexico City. She knows how it feels when it is crisp and newly minted from the bank teller. She knows how it feels when it is soft, worn thin by sweat and pocket lining, folded twice and tucked into the worn leather pouch tied around her waist.
Cash has a pulse. It rustles. It passes directly from a calloused palm to an eager hand. To Carmen, and to tens of millions across Mexico, money is something you can touch, smell, and hide under a mattress.
Yet, a quiet revolution is happening around her. The younger vendors are tapping smartphones against small plastic squares. They are watching numbers jump on a digital screen while Carmen counts out coins for a kilo of limes. For years, economists and financial institutions have asked a persistent question: Can Mexicans be weaned off an addiction to cash?
The phrasing is wrong.
Addiction implies a sickness, a stubborn refusal to accept progress out of ignorance. But the reality on the ground is far more human. This is not about addiction. This is about trust.
The Anatomy of the Informal Economy
Walk down any street in Oaxaca, Puebla, or Guadalajara, and you will see the beating heart of the nation. It does not tick in sleek downtown skyscrapers. It hums on the sidewalks.
Mexico’s informal economy is massive, accounting for more than half of the country's workforce. Millions of people wake up every morning, buy inventory with yesterday’s earnings, and sell food, crafts, or services without ever interacting with a formal banking institution. Why? Because the bank is far away, the fees are high, and the paperwork demands a formal address and a steady payroll that millions simply do not possess.
When your entire financial life depends on daily survival, cash is freedom. It is immediate. There is no waiting three business days for funds to clear. There is no internet connection required, no battery to charge, and no system outage that leaves you stranded at the checkout counter with a cart full of groceries.
To understand why cash remains king, you must understand the historical ghosts that haunt the Mexican banking sector. Generations of economic crises, currency devaluations, and banking scandals left deep psychological scars. Grandparents told parents, and parents told children: keep your wealth where you can see it. Banks take. Cash stays.
The Digital Bridge
Change rarely arrives by force. It arrives by convenience.
Enter CoDi, short for Cobro Digital. Developed by the Bank of Mexico, this mobile payment platform uses QR codes and near-field communication to allow instant, commission-free transfers straight from a smartphone. On paper, it was supposed to be the silver bullet that eradicated cash overnight.
It did not work as planned. At least, not immediately.
(To picture this, imagine a hypothetical vendor named Luis, who proudly taped a CoDi QR code to his taco cart two years ago. For months, customers stared at it like it was written in hieroglyphics. They wanted the comfort of dropping coins into his tip jar. Luis almost took the sign down.)
Technology alone cannot bridge a cultural chasm. Trust must be built brick by brick, transaction by transaction.
Slowly, something shifted. The smartphone became ubiquitous. Even in remote villages, cheap mobile data plans put the world in the palm of a hand. Younger generations, accustomed to ordering rides and food delivery apps, began questioning why paying a neighbor required a trip to the ATM.
Then came SPEI, Mexico’s electronic payment system, which scaled quietly in the background. Millions of everyday citizens discovered that transferring money instantly via mobile banking apps was not just for the wealthy. It was fast. It was safe.
The Invisible Stakes
We are not just talking about pieces of paper versus digital bytes. We are talking about security, inclusion, and the future of an entire economy.
Cash is expensive. It costs governments billions of dollars to print, transport, secure, and replace worn bills. Cash fuels the shadow economy, making it easier to evade taxes and harder to trace illicit funds. For the individual, cash is vulnerable. A stolen wallet means total loss. A burned house means life savings turned to ash.
Digital finance offers a ladder out of the shadows. When a small business owner takes digital payments, a digital paper trail is born. Suddenly, that vendor has a credit history. They can walk into a financial institution and apply for a loan to buy a larger refrigerator, a delivery motorcycle, or a brick-and-mortar storefront.
Financial inclusion is not about turning everyone into a corporate accountant. It is about dignity. It is about giving a mother in a rural town the ability to receive remittances from her son working across the border without paying exorbitant fees to wire services.
The Unfinished Story
Back in the market, Doña Carmen is not throwing away her leather pouch. Not yet.
A customer steps up to her stall, holding up a phone instead of a bill. Carmen smiles, reaches for the small plastic terminal her daughter convinced her to install last winter, and listens for the satisfying beep that confirms the transaction.
The transition is not a sudden severance. It is a slow, messy, beautiful negotiation between the past and the future. Mexico is not being weaned off cash. It is simply learning that trust can live in the cloud, just as easily as it once lived in the palm of a hand.
